package com.taven.app.javabase.thread.base.lockerror;

/**
 * <pre>
 * 一个线程死锁的例子
 * </pre>
 * 
 * @author Taven.Li <br>
 *         <p>
 *         CreateTime 2012-6-14
 *         </p>
 */

class A
{
	public synchronized void foo(B b)
	{
		System.out.println("当前线程名: " + Thread.currentThread().getName()
				+ " 进入了A实例的foo方法"); //①
		try
		{
			Thread.sleep(200);
		}
		catch (InterruptedException ex)
		{
			ex.printStackTrace();
		}
		System.out.println("当前线程名: " + Thread.currentThread().getName()
				+ " 企图调用B实例的last方法"); //③
		b.last();
	}

	public synchronized void last()
	{
		System.out.println("进入了A类的last方法内部");
	}
}

class B
{
	public synchronized void bar(A a)
	{
		System.out.println("当前线程名: " + Thread.currentThread().getName()
				+ " 进入了B实例的bar方法"); //②
		try
		{
			Thread.sleep(200);
		}
		catch (InterruptedException ex)
		{
			ex.printStackTrace();
		}
		System.out.println("当前线程名: " + Thread.currentThread().getName()
				+ " 企图调用A实例的last方法"); //④
		a.last();
	}

	public synchronized void last()
	{
		System.out.println("进入了B类的last方法内部");
	}
}

public class DeadLock implements Runnable
{
	A a = new A();
	B b = new B();

	public void init()
	{
		Thread.currentThread().setName("主线程");
		// 调用a对象的foo方法
		a.foo(b);
		System.out.println("进入了主线程之后");
	}

	public void run()
	{
		Thread.currentThread().setName("副线程");
		// 调用b对象的bar方法
		b.bar(a);
		System.out.println("进入了副线程之后");
	}

	public static void main(String[] args)
	{
		DeadLock dl = new DeadLock();
		// 以dl为target启动新线程
		new Thread(dl).start();
		// 调用init()方法
		dl.init();
	}
}
